xattr: add listxattr helper

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Add a tiny helper to determine whether an xattr handler given a specific
dentry supports listing the requested xattr. We will use this helper in
various filesystems in later commits.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

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Christian Brauner 2023-02-01 14:14:53 +01:00 • committed by Christian Brauner (Microsoft)

parent f2620f166e

commit 2db8a94804

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include/linux/xattr.h

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